I've no doubt this has been rehashed numerous times but still wanted to run it past the board.
Should be on the ground 8 Sept for Grizzly. This will not be Brown Bear. I'll be far above the 62nd parallel. My outfitter tells me a large boar can go 500-550 lbs; sows about 1/2 that. They "do" shoot a 9 footer each year. About 25% of his bears are B&C. He prefers shots @ 80-100 yds. Some hunters have shot as far as 250 yds. Average wind speed per a climate web site I found for the local town is 10 mph with a max of 57 mph. Their are no trees or mountains where I'm going so I'm told it blows, alot! No steep up/down angles. Just wide open rolling country.
I've got two rifles with 3 bullet choices.
My first is my Rem 700 in 30-06 Ackely w/ 26" ss Lilja barrel pushing the 180 Accubond @ 3000 fps. Accuracy can get me 4.25" groups at 800 yds. MPBR=303 yds w/ a 3" max/min height. 10 mph wind moves the bullet 5.5" @ 300 yds. Enerby is 2431 ft lbs w/ impact vel being 2466 fps.
My 2nd is the same rifle but with the 200 Partition @ 2850 fps. Accuracy is just about as good. MPBR=287 yds. 300 yd bullet movement due to 10 mph wind is 6.3". Energy is 2363 ft lbs w/ impact vel being 2307 fps
My 3rd possible choice is a CZ 550 American in 9.3x62 pushing the 286 Paritition at 2400 fps. Accuracy with my load has been 1 to 1-1/4 MOA. MPBR=241 yds. 10 mph wind moves the bullet 8" @ 300 yds. Energy is 2320 ft lbs with impact vel being 1911 fps.
Nosler suggest 1800 minimum impact velocity.
I'm not expecting any bad things to happen but one should still be prepared. I talked to one of the outfitters previous 2007 bear hunters who ended up taking his 7' Grizzly @ 100 ft as it was "walking" unknowingly towards him on a path through the willows. Plowed it under with a 300 RUM and the 180 Scirrocco.
I'm not worried about any of the potential combinations "not" working. Wish I could shoot a bear with each combo. Like that's going to happen!